Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ee2a9bbb794c89…

MALICIOUS

PDF

90.1 KB Created: 2021-03-21 04:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1f58ce5946e6f728371f1be6cbf2e2d5 SHA-1: ed8404817bb2329d1564edf30b8e844a9612646c SHA-256: 72ee2a9bbb794c89a1194ea26ac22cc42e13310ff45018ceff6f20745692c651
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which are hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic specifically identifies an Amazon brand impersonation lure pointing to a redirector URL. The ML classifier and ClamAV detection further confirm the malicious nature of the PDF, likely serving as a credential phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/manalabutijuvubuj.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/123?utm_term=attached+here+is+the+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450876/normal_603fddaae65a9.pdfIn PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/manalabutijuvubuj.pdfIn PDF document text
    • https://dumopodowejuna.weebly.com/uploads/1/3/4/5/134591879/rowatomowafupotupi.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/043a4b25c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485799/normal_5ffec4fcb21a3.pdfIn PDF document text
    • http://kewunorivibaro.22web.org/guidewire_logo_vector.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405638/normal_5fcb4178e4482.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/mofozupaxubufajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5fd283995314e.pdfIn PDF document text
    • http://fisutef.iblogger.org/38617701299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476123/normal_5feb08195009e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_ed1927299a0a49c4a15eb97699f984c9.pdf?index=trueIn PDF document text
    • https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_a0d3b26a03544efb821f61f542aa9253.pdf?index=trueIn PDF document text
    • http://koverojinekup.rf.gd/wings_of_fire_graphic_novel_2.pdfIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_c7c5bae835f34c4bb93976a24e016aff.pdf?index=trueIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_d1370d386dc34a27a8942f2b9817093b.pdf?index=trueIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_f29edf96fa164def8f6817f2f0f598dd.pdf?index=trueIn PDF document text
    • http://nobufep.epizy.com/bushido_blade_rom.pdfIn PDF document text
    • http://dizojid.rf.gd/gusixa.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/22384630874.pdfIn PDF document text
    • http://lawedeg.rf.gd/duraflame_1500_watt_infrared_heater_reviews.pdfIn PDF document text
    • http://sazojojuw.rf.gd/hp_laserjet_p1006_driver_for_mac_download.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_62940233ea7c48da9d5c080495bad564.pdf?index=trueIn PDF document text
    • http://darabeloleje.rf.gd/zezunipuwagekunibiwikumu.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_6930eebbf85b48ee8dc2a6b11b7cf86e.pdf?index=trueIn PDF document text
    • http://kidexedobarali.rf.gd/22753657178.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_02c23067431041a5aa785a17efd3d8c5.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001222e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222E 5116 bytes
SHA-256: 8e97b77c3664d6ea019e74d7f959f585b6df58b1651b3c394d0f468d147ecfef
font_01_sfnt_off0001338e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338E 11100 bytes
SHA-256: 80f7bd3f5ce19b15f982f77c99ca8eded2d6b6f803d9db5a918c85619509e674